[URL="http://api.tweetmeme.com/share?url=http://espn.go.com/nfl/story/_/id/8657904/jim-harbaugh-undergoing-follow-evaluation-heart&service=bit.ly&source=espn"][IMG]http://api.tweetmeme.com/imagebutton.gif?url=http://espn.go.com/nfl/story/_/id/8657904/jim-harbaugh-undergoing-follow-evaluation-heart[/IMG][/URL]San Francisco 49ers coach Jim Harbaugh had an appointment Tuesday for a follow-up evaluation with doctors after undergoing a minor procedure last Thursday for an irregular heartbeat.